Wrench quick release apparatus

ABSTRACT

A wrench quick release apparatus includes a sleeve, a positioning unit, a wrench unit and an elasticity unit. The sleeve includes a channel and an engaging section for engaging to a first plate. The positioning unit inserts in the channel of the sleeve, and includes one end inserted through the first plate and an opposite end protrudes out from the channel of the sleeve. The wrench unit is pivotally connected to the positioning unit and protrudes out from one end of the sleeve. The elasticity unit includes one end pushed against the positioning unit and an opposite end pushed against the sleeve. Accordingly, the wrench quick release apparatus is first engaged to the first plate through the sleeve and then engaged to or disengaged from a second plate.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation-in-part patent application of U.S.application Ser. No. 13/344,127 filed on Jan. 5, 2012, the entirecontents of which are hereby incorporated by reference for whichpriority is claimed under 35 U.S.C. §120.

FIELD OF TECHNOLOGY

The present invention relates to wrench quick release apparatuses, andmore particularly, to a wrench quick release apparatus for quicklyassembling a first plate and a second plate.

BACKGROUND

Various approaches for assembling two plate-like objects (e.g., amotherboard and a housing) are available. A common approach is fasteningthrough a screw thread structure which generally comprises a screw, acap and a sleeve. The screw comprises an end of a larger diameter as aforce receiving section provided with a screw groove, and another endcomprises a screw rod connected with the force receiving section. Thecap is fitted around a hollow cylinder about the force receiving sectionfor encapsulating and protecting the screw. The sleeve is a hollowcylinder for fitting the screw rod of the screw in a. way that thesleeve and the cap are dynamically fitted. Accordingly, with a fasteningunit, an end of the sleeve is first engaged to a first object (e.g., a.motherboard), rendering the screw rod of the screw corresponded to afastening opening of a second object (e.g., a housing), and a rotationalforce is applied to the screw groove of the force receiving section ofthe screw with the aid of a tool, so as to fasten the screw rod into thefastening opening of the second object and complete the assembly of thetwo objects. By contrast, a rotational force applied to the screw grooveof the force receiving section of the screw with a tool is also requiredfor disengaging the screw rod from the fastening opening of the secondobject.

However, as previously described, the above structure that completesfastening by a screw thread requires an additional tool for applying arotational force to the screw groove of the force receiving section ofthe screw for engagement or disengagement, which means thatcorresponding engagement and disengagement procedures are more complexand time-consuming. Furthermore, although the prior art provides certainfastening approaches for assembling two objects, these conventionalapproaches involve fastening operations performed by manual forces thatdirectly press fastening units. Consequently, not only a fasteningprocess of such conventional approach is rather laborious andunpractical, but also utilization inconvenience is resulted due to alack of force applying section when disengaging the fastening units inreverse.

Accordingly, it is imperative to invent a wrench quick release apparatusfor overcoming the drawbacks associated with the prior art.

SUMMARY

In view of the aforesaid drawbacks of the prior art, the inventor of thepresent invention conceived room for improvement in the prior art andthus conducted extensive researches and experiments according to theinventor's years of experience in the related industry, and finallydeveloped a wrench quick release apparatus for steadily and quicklyassembling a first plate and a. second plate with minimal efforts in aconvenient manner.

It is an objective of the present invention to provide a wrench quickrelease apparatus comprising a sleeve, a positioning unit, a wrench unitand an elasticity unit. The wrench quick release apparatus is firstengaged to a first plate via the sleeve then engaged to or disengagedfrom the second plate with the positioning section of the positioningunit through rotations of the wrench unit, so as to quickly and steadilyassemble the first plate with the second plate with minimal efforts in aconvenient manner.

In order to achieve the above and other objectives, the presentinvention provides a wrench quick release apparatus for first engaging afirst plate and then engaging a second plate to assemble the first platewith the second plate comprises: a sleeve, comprising a first end, asecond end opposite to the first end, and a channel in communicationwith the first end and the second end, the first end comprising anengaging section for engaging the first plate; a positioning unit, beinga column body movably inserted in the channel of the sleeve, comprisinga positioning end protruding to the first end of the sleeve, apositioning section provided at the positioning end and for engagingwith the second plate, and an activating end opposite to the positioningend and protruding out of the second end of the sleeve; a wrench unit,comprising a wrench section and a pushing section connected to thewrench section, the pushing section being a column body and beingmovably and pivotally connected to the activating end of the positioningunit such that when the wrench unit is substantially rotated by 90degrees to push the pushing section against the second end of thesleeve, the positioning end and the positioning section of thepositioning unit are given impetus for protrusion or retreat; and anelasticity unit, being fitted around the positioning unit, having itsone end pushed against the positioning unit and its another end pushedagainst the sleeve.

Regarding the wrench quick release apparatus in the preferredembodiment, the pushing section has two first contact surfaces and asecond contact surface, the second contact surface being connectedbetween the first contact surfaces, the first contact surfaces being twolateral surfaces of the pushing section, respectively, the secondcontact surface being an end surface of the pushing section, the secondcontact surface being perpendicular to the first contact surfacessubstantially, wherein a vertical distance from a point of pivotalconnection of the pushing section and the activating end to the firstcontact surfaces does not equal a vertical distance from the point ofpivotal connection to the second contact surface, wherein the firstcontact surfaces and the second contact surface are movably pushedagainst the second end of the sleeve.

Regarding the wrench quick release apparatus in the preferredembodiment, the second contact surface connects to the first contactsurfaces by a curved surface, respectively.

Regarding the wrench quick release apparatus in the preferredembodiment, the second contact surface is a curved surface.

Regarding the wrench quick release apparatus in the preferredembodiment, the pushing section of the wrench unit comprises a pivotgroove and a pivot inserted through the pivot groove, and the pivotgroove is concavely disposed on the first contact surfaces and thesecond contact surface or concavely disposed on one of the first contactsurfaces and the second contact surface, wherein the pivot groove isfitted around the activating end of the positioning unit, and the pivotis inserted through the activating end of the positioning unit.

Regarding the wrench quick release apparatus in the preferredembodiment, the second end of the sleeve has a directional protrudingsection, such that the activating end of the positioning unit penetratesand exits the directional protruding section, and the pivot groovemovably straddles the directional protruding section.

Regarding the wrench quick release apparatus in the preferredembodiment, the positioning section of the positioning unit comprises apositioning column body inserted through the second plate, a threadedcolumn fastened to the second plate, at least two elastic fasteningbodies each comprising at its one side a protruding fastening sectionfor fastening to the second plate, or a hook for fastening the secondplate.

Regarding the wrench quick release apparatus in the preferredembodiment, the engaging section is a press-in section, a fasteningsection, a welding section, a flare-in section, an adhering section, amagnetic attraction section, or a snap-engaging section.

Regarding the wrench quick release apparatus in the preferredembodiment, the fastening section comprises a first screw thread at thechannel and a fastening element fastened to the first screw thread, andthe fastening element comprises a second screw thread matching the firstscrew thread; the engaging section of the sleeve first accommodates oneside of the first plate and the fastening element then fastens anotherside of the first plate to fasten the second screw thread to the firstscrew thread.

Regarding the wrench quick release apparatus in the preferredembodiment, the engaging section is integrally formed on the firstplate, and the channel is in communication with a first engaging hole ofthe first plate.

Accordingly, a wrench quick release apparatus of the present inventionis characterized in that: an engaging section of a sleeve is riveted,fastened, welded, installed, adhered, magnetically attracted, orsnap-engaged to a first engaging hole of a first plate; a. user rotatesa wrench unit and thus drives a positioning unit, such that apositioning section of the positioning unit penetrates a. first engaginghole of a. first plate and gets coupled to a second engaging hole of asecond plate, so as to effectuate quick assembly of two objects and firmsnap-engagement of the two objects in a labor-saving and convenientmanner.

BRIEF DESCRIPTION

Objectives, features, and advantages of the present invention arehereunder illustrated with specific embodiments in conjunction with theaccompanying drawings, in which:

FIG. 1 is an assembled schematic cross-sectional view of the preferredembodiment of the present invention;

FIG. 2 is a schematic view of the application and operation of thepreferred embodiment of the present invention;

FIG. 3 is another schematic view of the application and operation of thepreferred embodiment of the present invention;

FIG. 4 is a schematic view of a curved surface of the preferredembodiment of the present invention;

FIG. 5 is a schematic view of a second contact surface provided in theform of a curved surface according to the preferred embodiment of thepresent invention;

FIG. 6 is a schematic view of a pivot groove of the preferred embodimentof the present invention;

FIG. 7 is a top view of FIG. 6;

FIG. 8 is another schematic view of the pivot groove of the preferredembodiment of the present invention;

FIG. 9 is a top view of FIG. 8;

FIG. 10 is a schematic view of a directional protruding section of thepreferred embodiment of the present invention;

FIG. 11 is another schematic view of the directional protruding sectionof the preferred embodiment of the present invention;

FIG. 12 is a schematic view of a threaded column of the preferredembodiment of the present invention;

FIG. 13 is a schematic view of an elastic fastening bodies andprotruding fastening section of the preferred embodiment of the presentinvention;

FIG. 14 is a schematic view of a hook of the preferred embodiment of thepresent invention;

FIG. 15 is a schematic view of an engaging section including a fasteningsection according to the preferred embodiment of the present invention;

FIG. 16 is another schematic view of the engaging section including afastening section according to the preferred embodiment of the presentinvention;

FIG. 17 is a schematic view of an engaging section including a weldingsection or adhering section according to the preferred embodiment of thepresent invention;

FIG. 18 is a schematic view of an engaging section including a flare-insection according to the preferred embodiment of the present invention;

FIG. 19 is a schematic view of an engaging section including a magneticattraction section according to the preferred embodiment of the presentinvention;

FIG. 20 is a schematic view of an engaging section including asnap-engaging section according to the preferred embodiment of thepresent invention; and

FIG. 21 is a schematic view of an engaging section and a first platewhich are integrally formed according to the preferred embodiment of thepresent invention.

DETAILED DESCRIPTION

FIGS. 1, 2 and 3 show schematic diagrams of a wrench quick releaseapparatus according to an embodiment of the present invention. Thewrench quick release apparatus is first engaged to a first plate 10 at dthen engaged to a second plate 20, so as to assemble the first plate 10with the second plate 20. The wrench quick release apparatus accordingto a preferred embodiment of the present invention comprises a sleeve 1,a positioning unit 2, a wrench unit 3, and an elasticity unit 4. Thesleeve 1 comprises a first end 11, a second end 12 opposite to the firstend 11, a channel 13 in communication with the first end 11 and thesecond end 12, and an engaging section 14 at the first end 11 forengaging to the first plate 10. The positioning unit 2, being a columnbody movably inserted in the channel 13 of the sleeve 1, comprises apositioning end 21 protruding to the first end 11 of the sleeve 1, apositioning section 22 provided at the positioning end 21 and forengaging the second plate 20, and an activating end 23 opposite to thepositioning end 21 and protruding out from the second end 12 of thesleeve 1. The wrench unit 3 comprises a wrench section 31 and a pushingsection 32 connected to an end of the wrench section 31. The pushingsection 32, which may be shaped as an eccentric cam, an elliptic body, acolumn body or other equivalent shapes, is movably and pivotallyconnected to one side of the activating end 23 of the positioning unit2, such that when the wrench unit 3 is substantially rotated by 90degrees to push the pushing section 32 against the second end 12 of thesleeve 1, the positioning end 21 and the positioning section 22 of thepositioning unit 2 are given impetus for protrusion or retreat forengaging with or disengaging from the second plate 20. The elasticityunit 4, being a screw spring or an elastic unit of other forms fittingaround the positioning unit 2, has its one end pushing against thepositioning unit 2 and its another end pushing against the sleeve 1, soas to provide impetus to the positioning section 22 of the positioningunit 2 to further engage with the second plate 20. Furthermore, theelasticity of the elasticity unit 4 enables the wrench unit 3 to bepositioned at a specific angle.

Referring to FIG. 1, FIG. 2 and FIG. 3, regarding the wrench quickrelease apparatus of the present invention, a second end 12 of thesleeve 1 is flat, the pushing section 32 has two first contact surfaces323 and a second contact surface 324, a first contact surface 323 andthe second contact surface 324 are flat. The second contact surface 324is connected between the first contact surfaces 323. The first contactsurfaces 323 are two lateral surfaces of the pushing section 32,respectively. The second contact surface 324 is an end surface of thepushing section 32. The first contact surfaces 323 are substantiallyperpendicular to the second contact surface 324. The vertical distancefrom a point of pivotal connection of the pushing section 32 and theactivating end 23 to the first contact surfaces 323 does not equal thevertical distance from the point of pivotal connection to the secondcontact surface 324. The first contact surfaces 323 and the secondcontact surface 324 are movably pushed against the second end 12 of thesleeve 1. Referring to FIG. 1 and FIG. 2, the positioning section 22initially protrudes from the first end 11 of the sleeve 1. The verticaldistance from the point of pivotal connection to the first contactsurfaces 323 is less than the vertical distance from the point ofpivotal connection to the second contact surface 324. When the wrenchunit 3 substantially rotates anticlockwise by 90 degrees, the pushingsection 32 is pushed against the second end 12 of the sleeve 1, therebydriving the positioning section 22 of the positioning unit 2 to retreatto the first end 11 of the sleeve 1 (as shown in FIG. 3). When thewrench unit 3 rotates anticlockwise by 90 degrees again or rotatesclockwise by 90 degrees again, the pushing section 32 is pushed againstthe second end 12 of the sleeve 1, thereby driving the positioningsection 22 of the positioning unit 2 to protrude from the first end 11of the sleeve 1 again. In the situation where the positioning section 22initially retreats to the first end 11 of the sleeve 1, and the verticaldistance from the point of pivotal connection to the first contactsurfaces 323 is larger than the vertical distance from the point ofpivotal connection to the second contact surface 324, the wrench unit 3substantially rotates anticlockwise by 90 degrees to push the pushingsection 32 against the second end 12 of the sleeve 1 and thus drive thepositioning section 22 of the positioning unit 2 to protrude from thefirst end 11 of the sleeve 1. The wrench unit 3 rotates anticlockwise by90 degrees again or rotates clockwise by 90 degrees again to push thepushing section 32 against the second end 12 of the sleeve 1 and thusdrive the positioning section 22 of the positioning unit 2 to retreat tothe first end 11 of the sleeve 1.

Referring to FIG. 4 and FIG. 5, regarding the wrench quick releaseapparatus of the present invention, the second contact surface 324connects to the first contact surfaces 323 by a curved surface 325,respectively, wherein the second contact surface 324 is a curvedsurface. Thanks to the smoothness of the curved surface, users rotatethe wrench unit 3 in a labor-saving manner.

Referring to FIG. 6 through FIG. 9, the pushing section 32 of the wrenchunit 3 comprises a pivot groove 321 at its center and a pivot 322 (bolt)inserted through the pivot groove 321. Referring to FIG. 6 and FIG. 7,the pivot groove 321 is concavely disposed on the first contact surfaces323 and the second contact surface 324. Referring to FIG. 8 and FIG. 9,the pivot groove 321 is concavely disposed on one of the first contactsurfaces 323 (FIG. 8 and FIG. 9 show that the pivot groove 321 isconcavely disposed on the lower one of the first contact surfaces 323)and the second contact surface 324. Thus, the pivot groove 321 is fittedaround the activating end 23 of the positioning unit 2, and the pivot322 is also inserted through the activating end 23 of the positioningunit 2, such that the pushing section 32 of the wrench unit 3 is movablyand pivotally connected to the activating end 23 of the positioning unit2. As a result, when the wrench unit 3 is rotated to push the pushingsection 32 against the second end 12 of the sleeve 1, the positioningunit 2 retreats and protrudes. Referring to FIG. 6 and FIG. 7, if thepivot groove 321 is concavely disposed on the first contact surfaces 323and the second contact surface 324, the wrench unit 3 can be freelyrotated by 180 degrees or less. Referring to FIG. 8 and FIG. 9, if thepivot groove 321 is concavely disposed on the lower one of the firstcontact surfaces 323 and the second contact surface 324, the upper oneof the first contact surfaces 323 will function as a stopping surfacesuch that, after the wrench unit 3 has been rotated by 90 degrees fromthe horizontal plane to the vertical plane, if the wrench unit 3 is tobe further rotated in the previous direction, the first contact surfaces323 will be stopped by the positioning unit 2, and thus the wrench unit3 will be freely rotated by 90 degrees or less.

Referring to FIG. 2, to apply the wrench quick release apparatus of thepresent invention, the engaging section 14 of the sleeve 1 is firstengaged by riveting, for example, to a first connecting opening 101 ofthe first plate 10. Referring to FIG. 3, as the wrench section 31 of thewrench unit 3 is rotated, the pushing section 32 is substantiallyrotated anticlockwise by 90 degrees to push against the second end 12 ofthe sleeve 1 to further inwardly draw the positioning end 21 and thepositioning section 22 of the positioning unit 2 into the sleeve 1.Afterward, when a second connecting opening 201 of the second plate 20is aligned with the first connecting opening 101 of the first plate 10,the wrench section 31 of the wrench unit 3 is again rotated, so as tosubstantially rotate the pushing section 32 clockwise (or anticlockwise)by 90 degrees, such that the pushing section 32 is pushed against thesecond end 12 of the sleeve 1. Accordingly, elastic forces of elasticityunit 4 are applied to the positioning unit 2 to engage (i.e., byinserting) the positioning section 22 at the positioning end 21 to thesecond connecting opening 201 of the second plate 20, thereby quicklyassembling the first plate 10 with the second plate 20. Furthermore, thewrench section 31 of the wrench unit 3 is capable of optimizing appliedforces to achieve reduced-effort operations when driving the positioningunit 2. In addition, the quick assembly can be completed without anyextra tools when applying the wrench quick release apparatus forassembling the first plate 10 and the second plate 20 to again enhanceutilization convenience of the present invention.

Referring to FIG. 10 and FIG. 11, the second end 12 of the sleeve 1 hasa directional protruding section 121. The directional protruding section121 is a rectangular parallelepiped or a cube. The activating end 23 ofthe positioning unit 2 penetrates and exits the directional protrudingsection 121. The pivot groove 321 movably straddles the directionalprotruding section 121. With the pivot groove 321 being guided by thedirectional protruding section 121, the wrench unit 3 is prevented fromrotating about the positioning unit 2 when wrenched, thereby enhancingease of use.

Referring to FIG. 1 through FIG. 3, the positioning section 22 of thepositioning unit 2 may comprise a positioning column 221 for insertinginto the second opening 201 of the second plate 20 to achievepositioning and assembly effects. Alternatively, as shown in FIG. 12,the positioning section 22 of the positioning unit 2 may also comprise athreaded column 222 for fastening to the second plate, so that thepositioning section 22 drives not only the positioning unit 2 forretreat and protrusion through the wrench unit 3 but also the threadedcolumn 222 for fastening to the second connecting opening (e.g., a screwopening) of the second plate. For another example shown in FIG. 13, thepositioning section 22 of the positioning unit 2 may comprise at leasttwo elastic fastening bodies 223 each comprising at its one side aprotruding fastening section 224 for fastening to the second plate.Thus, when driven by the elasticity unit 4 or the wrench unit 3, thepositioning unit 2 gets fastened to the second plate. For anotherexample shown in FIG. 14, the positioning section 22 of the positioningunit 2 may comprise a hook 225 for fastening the second plate.Similarly, the hook 225 gets fastened to the second plate when driven bythe elasticity unit 4 or the wrench unit 3.

It should be noted that various modifications may be made to thestructure of the engaging section 14 of the sleeve 1 for engaging withthe first plate 10 without departing from the spirit of the presentinvention, and that the various modifications are encompassed within thescope of the present invention. For example, referring to FIGS. 2 and 3showing other embodiments of the present invention, the engaging section14 of the sleeve 1 may comprise a press-in section 141 for installing tothe first plate 10, or a fastening section 142 for fastening to thefirst plate 10. Referring to FIG. 15, the fastening section 142 may be ascrew thread for directly screwing and fastening to the first connectingopening 101 of the first plate 10. Alternatively, as shown in FIG. 16,the fastening section 142 comprises a first screw thread 143 at thechannel 13 and a ring-shaped fastening element 144 fastened to the firstscrew thread 143, and the fastening element 144 is provided with asecond screw thread 145 matching the first screw thread 143.Accordingly, the engaging section 14 of the sleeve 1 first accommodatesone side of the first plate 10 and the fastening element 144 thenfastens the other side of the first plate 10, so as to fasten the secondscrew thread 145 to the first screw thread 143 located in the channel 13to further fasten the sleeve 1 to the first connecting opening 101 ofthe first plate 10, As shown in FIG. 17, in another embodiment of thepresent invention, the engaging section 14 of the sleeve 1 may comprisea welding section 146 (or adhering section) for welding (or adhering) tothe first connecting opening 101 of the first plate 10. Referring toFIG. 18 showing another embodiment of the present invention, theengaging section 14 of the sleeve 1 may comprise a flare-in section 147for installing to the first connecting opening 101 of the first plate10. Referring to FIG. 19, the engaging section 14 of the sleeve 1comprises a magnetic attraction section 148 attracted to the firstengaging hole 101 of the first plate 10 magnetized. Referring to FIG.20, the engaging section 14 of the sleeve 1 comprises a snap-engagingsection 149 for snap-engaging with the first engaging hole 101 of thefirst plate 10.

Referring to FIG. 21, the engaging section 14 of the sleeve 1 isintegrally formed on the first plate 10 directly, and the channel 13 isin communication with the first engaging hole 101 of the first plate 10,to achieve the same effects.

The present invention further provides another wrench quick releaseapparatus which comprises a plurality of said wrench quick releaseapparatuses, for example, two said wrench quick release apparatuses,three said wrench quick release apparatuses, or four said wrench quickrelease apparatuses, wherein the wrench sections 31 are connected toeach other, to not only increase the strength of engagement of the firstplate 10 and the second plate 20, but also allow the wrench sections 31to be wrenched simultaneously and operated easily.

With the above embodiments, it is illustrated that the present inventionprovides a novel wrench quick release apparatus offering manyadvantages. Through the combination of the sleeve, the positioning unit,the wrench unit and the elasticity unit, the wrench quick releaseapparatus of the present invention is first engaged to the first platethrough the sleeve and is then engaged to or disengaged from the secondplate with the positioning section of the positioning unit throughrotations of the wrench unit, so as to quickly and steadily assemble thefirst plate with the second plate with minimal efforts in a convenientmanner.

The present invention is disclosed above by preferred embodiments.However, persons skilled in the art should understand that the preferredembodiments are illustrative of the present invention only, but shouldnot be interpreted as restrictive of the scope of the present invention.Hence, all equivalent variations and replacements made to the aforesaidembodiments should fall within the scope of the present invention.Accordingly, the legal protection for the present invention should bedefined by the appended claims.

What is claimed is:
 1. A wrench quick release apparatus, for engagingwith a first plate and then engaging with a second plate, comprising: asleeve having a first end, a second end opposite to the first end, achannel in communication with the first end and the second end, and anengaging section for engaging to the first plate; a positioning unit,being a column body movably inserted in the channel of the sleeve,comprising a positioning end protruding to the first end of the sleeve,a positioning section provided at the positioning end and for engagingto a positioning section of the second plate, and an activating endopposite to the positioning end and protruding out from the second endof the sleeve; a wrench unit comprising a wrench section and a pushingsection connected to the wrench section, the pushing section being acolumn body and movably and pivotally connected to the activating end ofthe positioning unit, such that the wrench unit substantially rotates intwo directions, the two directions being clockwise and anticlockwise, by90 degrees to push the pushing section against the second end of thesleeve, thereby driving the positioning end and the positioning sectionof the positioning unit to protrude or retreat; and an elasticity unitfitted around the positioning unit, comprising an end pushed against thepositioning unit and another end pushed against the sleeve; wherein, thesecond end of the sleeve is flat, the pushing section has two firstcontact surfaces and a second contact surface, the first contactsurfaces and the second contact surface are flat, the second contactsurface being connected between the first contact surfaces, the firstcontact surfaces being two lateral surfaces of the pushing section,respectively, the second contact surface being an end surface of thepushing section, the second contact surface being perpendicular to thefirst contact surfaces substantially, wherein a vertical distance from apoint of pivotal connection of the pushing section and the activatingend to the first contact surfaces does not equal a vertical distancefrom the point of pivotal connection to the second contact surface,wherein the first contact surfaces and the second contact surface aremovably pushed against the second end of the sleeve.
 2. The wrench quickrelease apparatus of claim 1, wherein the second contact surfaceconnects to the first contact surfaces by a curved surface,respectively.
 3. The wrench quick release apparatus of claim 1, whereinthe pushing section of the wrench unit comprises a pivot groove and apivot inserted through the pivot groove, and the pivot groove isconcavely disposed on the first contact surfaces and the second contactsurface or concavely disposed on one of the first contact surfaces andthe second contact surface, wherein the pivot groove is fitted aroundthe activating end of the positioning unit, and the pivot is insertedthrough the activating end of the positioning unit.
 4. The wrench quickrelease apparatus of claim 3, wherein the second end of the sleeve has adirectional protruding section, such that the activating end of thepositioning unit penetrates and exits the directional protrudingsection, and the pivot groove movably straddles the directionalprotruding section.
 5. The wrench quick release apparatus of claim 1,wherein the positioning section of the positioning unit comprises apositioning column body for inserting through the second plate, athreaded column for fastening to the second plate, at least two elasticfastening bodies each comprising at its one side a protruding fasteningsection for fastening to the second plate, or a hook for fastening thesecond plate.
 6. The wrench quick release apparatus of claim 1, whereinthe engaging section is one of a rivet section, a fastening section, awelding section, a flare-in section, an adhering section, a magneticattraction section, and a snap-engaging section.
 7. The wrench quickrelease apparatus of claim 1, wherein the engaging section is afastening section, the fastening section comprises a first screw threadat the channel and a fastening element fastened to the first screwthread, and the fastening element comprises a second screw threadmatching the first screw thread; the engaging section of the sleevefirst for accommodating one side of the first plate and the fasteningelement then for fastening another side of the first plate to fasten thesecond screw thread to the first screw thread.
 8. The wrench quickrelease apparatus of claim 1, wherein the engaging section is forengaging the first plate, and the channel is in communication with afirst engaging hole of the first plate.
 9. A wrench quick releaseapparatus, for engaging with a first plate and then engaging with asecond plate, comprising: a sleeve having a first end, a second endopposite to the first end, a channel in communication with the first endand the second end, and an engaging section for engaging to the firstplate; a positioning unit, being a column body movably inserted in thechannel of the sleeve, comprising a positioning end protruding to thefirst end of the sleeve, a positioning section provided at thepositioning end and for engaging to a positioning section of the secondplate, and an activating end opposite to the positioning end andprotruding out from the second end of the sleeve; a wrench unitcomprising a wrench section and a pushing section connected to thewrench section, the pushing section being a column body and movably andpivotally connected to the activating end of the positioning unit, suchthat the wrench unit substantially rotates by 90 degrees to push thepushing section against the second end of the sleeve, thereby drivingthe positioning end and the positioning section of the positioning unitto protrude or retreat; and an elasticity unit fitted around thepositioning unit, comprising an end pushed against the positioning unitand another end pushed against the sleeve; wherein, the second end ofthe sleeve is flat, the pushing section has two first contact surfacesand a second contact surface, the first contact surfaces and the secondcontact surface are flat, the second contact surface being connectedbetween the first contact surfaces, the first contact surfaces being twolateral surfaces of the pushing section, respectively, the secondcontact surface being an end surface of the pushing section, the secondcontact surface being perpendicular to the first contact surfacessubstantially, wherein a vertical distance from a point of pivotalconnection of the pushing section and the activating end to the firstcontact surfaces does not equal a vertical distance from the point ofpivotal connection to the second contact surface, wherein the firstcontact surfaces and the second contact surface are movably pushedagainst the second end of the sleeve; wherein the engaging section is afastening section, the fastening section comprises a first screw threadat the channel and a fastening element fastened to the first screwthread, and the fastening element comprises a second screw threadmatching the first screw thread; engaging section of the sleeve firstfor accommodating one side of the first plate and the fastening elementthen for fastening another side of the first plate to fasten the secondscrew thread to the first screw thread.